How do you change a fuel pump in a kia sodona 2003?

i need help to change a fuel pumpHow do you change a fuel pump in a kia sodona 2003?Normally, you will need to drop the tank to replace the pump, but sometimes there is an access cover under the rear seat bottom. You might get lucky. How did you diagnose the pump is the problem? Did you verify fuel pressure and power to the pump?